[mythtvnz] Myth & Raid. SW or HW..

[Joel Wirāmu Pauling]

Yup there are several (inter-related) issues with them; and unless you are
prepared to tweak the as shipped settings on them then yes you need to stay
away from them for anything other than temporary sneaker-net style use.

Failed retry timeouts, cause the starving of IO issue which equates to
sluggish responsiveness from the system, as well as higher drive failure
rate due to forward error correcting (or tler in WD's terms) being set off
on the drives by default. However if you mix them with another drive that
doesn't have said issue then it's mostly unnoticeable in a RAID 1 + 0
scenario with 4 discs.

FYI you can find the tool required to tweak the TLER timeouts (or even just
turn it on) by searching for wdtler.exe

Some people have said it doesn't work with newer drives but it worked just
fine on a batch of WDEARS 1TB drives circa last year for me.



On 19 July 2012 14:11, Hadley Rich <hads at nice.net.nz> wrote:

> On 19/07/12 14:07, Joel Wirāmu Pauling wrote:
>
>> As for the comments against the 'Green' drives, you can turn off the
>> head parking/minimize the spin count etc by ensuring you update the
>> firmware on the drives disabling these features (google it) before
>> putting them into an array.
>>
>
> That's not the issue, it's mostly based around the time they take to retry
> failed reads causing them to be failed from the array. More info if you
> search the web.
>
> hads
> --
> http://nice.net.nz
>
>
> ______________________________**_________________
> mythtvnz mailing list
> mythtvnz at lists.linuxnut.co.nz
> http://lists.ourshack.com/**mailman/listinfo/mythtvnz<http://lists.ourshack.com/mailman/listinfo/mythtvnz>
> Archives http://www.gossamer-threads.**com/lists/mythtv/mythtvnz/<http://www.gossamer-threads.com/lists/mythtv/mythtvnz/>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/mythtvnz/attachments/20120719/1fdd9b5b/attachment.html>